package com.sky.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.collection.CollectionUtil;
import cn.hutool.db.sql.Order;
import cn.hutool.json.JSONUtil;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.Builder;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WebSocketServer webSocketServer;
    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional
    @Override
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {

        // 处理业务异常（地址簿为空，购物车数据为空）
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if(addressBook == null){
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        // 查询当前用户购物车数据
        Long userId = BaseContext.getCurrentId();

        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);

        if(shoppingCartList == null || shoppingCartList.isEmpty()){
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        // 2.订单表中插入一条数据
        Orders orders = BeanUtil.copyProperties(ordersSubmitDTO, Orders.class);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(userId);

        orderMapper.insert(orders);
        // 3.订单明细表插入N条数据
        // 批量插入
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for(ShoppingCart cart: shoppingCartList) {
            OrderDetail orderDetail = BeanUtil.copyProperties(cart, OrderDetail.class);
            orderDetail.setOrderId(orders.getId());
            orderDetailList.add(orderDetail);
        }
        orderDetailMapper.insertBatch(orderDetailList);
        // 4.清空购物车
        shoppingCartMapper.deleteByUseId(userId);
        // 5.封装返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();
        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);
        // 推送数据 type, orderId, content
        Map<String, Object> map = new HashMap<>();
        map.put("type", 1);
        map.put("orderId", ordersDB.getId());
        map.put("content", "订单号：" + outTradeNo);

        String jsonStr = JSONUtil.toJsonStr(map);
        webSocketServer.sendToAllClient(jsonStr);
    }


    /**
     * 历史订单
     * @param pageNum
     * @param pageSize
     * @param status
     * @return
     */
    @Override
    public PageResult pageQuery4User(int pageNum, int pageSize, Integer status) {
        PageHelper.startPage(pageNum, pageSize);
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setStatus(status);
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());

        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        List<OrderVO> list = new ArrayList<>();

        // 查询出订单明细，并封装入OrderVO进行响应
        if(page != null && page.getTotal() > 0){
            for(Orders orders : page.getResult()){
                OrderVO orderVO = BeanUtil.copyProperties(orders, OrderVO.class);
                List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
                orderVO.setOrderDetailList(orderDetailList);
                list.add(orderVO);
            }
        }

        return new PageResult(page.getTotal(), list);
    }

    /**
     * 订单详情
     * @param id
     * @return
     */
    @Override
    public OrderVO details(Long id) {

        Orders orders = orderMapper.getById(id);
        Long addressBookId = orders.getAddressBookId();
        String address = getAddress(addressBookId);
        orders.setAddress(address);

        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
        OrderVO orderVO = BeanUtil.copyProperties(orders, OrderVO.class);
        orderVO.setOrderDetailList(orderDetailList);
        log.info("订单详情：{}", orderVO);
        return orderVO;
    }

    /**
     * 用户取消订单
     *
     * @return
     */
    @Override
    public void userCancelById(Long id) throws Exception {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        // 订单处于待接单状态下取消，需要进行退款
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            //调用微信支付退款接口
            weChatPayUtil.refund(
                    ordersDB.getNumber(), //商户订单号
                    ordersDB.getNumber(), //商户退款单号
                    new BigDecimal(0.01),//退款金额，单位 元
                    new BigDecimal(0.01));//原订单金额

            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }

        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);

    }

    /**
     * 再来一单
     *
     * @param id
     * @return
     */
    @Override
    public void repetition(Long id) {
        // 查询当前用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单id查询当前订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();

            // 将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());

        // 将购物车对象批量添加到数据库
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {

        int pageNum = ordersPageQueryDTO.getPage();
        int pageSize = ordersPageQueryDTO.getPageSize();
        PageHelper.startPage(pageNum, pageSize);

        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        List<OrderVO> vos = getOrderVOList(page);
        log.info("查询结果：{}", vos);
        return new PageResult(page.getTotal(), vos);

    }

    @Override
    public OrderStatisticsVO statistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量 2 3 4
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        // 将查询出的数据封装到orderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {

        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();

        orderMapper.update(orders);
    }

    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());

        if(ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
//        log.info("=====>拒单");
        Integer status = ordersDB.getStatus();

        if(status == Orders.PAID) {
            //用户已支付，需要退款
            String refund = weChatPayUtil.refund(
                    ordersDB.getNumber(),
                    ordersDB.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01));
            log.info("申请退款：{}", refund);
            ordersDB.setPayStatus(Orders.REFUND);// 退款状态
        }

        ordersDB.setStatus(Orders.CANCELLED);
        ordersDB.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        ordersDB.setCancelTime(LocalDateTime.now());
        orderMapper.update(ordersDB);
    }

    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) throws Exception {

        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());

        if(ordersDB.PAID == 1) {
            //用户已支付，需要退款
            String refund = weChatPayUtil.refund(
                    ordersDB.getNumber(),
                    ordersDB.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01));
            log.info("申请退款：{}", refund);
//            ordersDB.setStatus(Orders.REFUND);
        }

        ordersDB.setStatus(Orders.CANCELLED);
        ordersDB.setCancelReason(ordersCancelDTO.getCancelReason());
        ordersDB.setCancelTime(LocalDateTime.now());
        orderMapper.update(ordersDB);
    }

    @Override
    public void delivery(Long id) {
        Orders orderDB = orderMapper.getById(id);

        if(orderDB == null || !orderDB.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        orderDB.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update(orderDB);
    }

    @Override
    public void complete(Long id) {
        Orders ordersDB = orderMapper.getById(id);

        if(ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        ordersDB.setStatus(Orders.COMPLETED);
        ordersDB.setDeliveryTime(LocalDateTime.now());
        orderMapper.update(ordersDB);
    }

    @Override
    public void reminder(Long id) {
        Orders ordersDB = orderMapper.getById(id);
        if(ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Map<String, Object> map = new HashMap<>();
        map.put("type", 2);
        map.put("orderId", ordersDB.getId());
        map.put("content", "订单号：" + ordersDB.getNumber());
        String jsonStr = JSONUtil.toJsonStr(map);
        // 向客户端推消息
        webSocketServer.sendToAllClient(jsonStr);
    }

    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        List<OrderVO> list = new ArrayList<>();
        List<Orders> orderList = page.getResult();
        if(CollUtil.isNotEmpty(orderList)) {
            list = orderList.stream().map(order -> {
                String address = getAddress(order.getAddressBookId());
                order.setAddress(address);
                OrderVO orderVO = BeanUtil.copyProperties(order, OrderVO.class);

                String OrderDishes = getOrderDishesStr(order);
                orderVO.setOrderDishes(OrderDishes);
                return orderVO;
            }).collect(Collectors.toList());
        }
        return list;
    }
    public String getOrderDishesStr(Orders orders) {
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
        String orderDishes = orderDetailList.stream().map(x -> {
            return x.getNumber() + "份" + x.getName();
        }).collect(Collectors.joining(","));
        return orderDishes;
    }
    private String getAddress(Long addressBookId) {
        AddressBook addressBook = addressBookMapper.getById(addressBookId);
        if (addressBook != null) {
            return addressBook.getProvinceName() + addressBook.getCityName() +
                    addressBook.getDistrictName() + addressBook.getDetail();
        }
        return null;
    }
}
